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DR. LAUREN DEMARIS DO
NPI 1124640107
Internal Medicine in Portsmouth, NH

Active since May 12, 2020PECOS EnrolledAccepts Medicare Assignment
333 BORTHWICK AVE STE 100, PORTSMOUTH, NH 03801(603) 436-5110 Get Directions Write a Review

NPPES record last updated: July 31, 2024. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 31, 2024, Jun 24, 2021, May 31, 2020 and 1 more (4 updates tracked since 2020).

About Dr. Lauren Demaris Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LAUREN DEMARIS DO (NPI 1124640107) is an individual internal medicine provider in Portsmouth, New Hampshire, licensed in New Hampshire (25384) and active in the NPI registry since May 2020. She is enrolled in Medicare PECOS, is affiliated with Elliot Hospital, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1124640107
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. LAUREN DEMARISCredential: DO
Location Address333 BORTHWICK AVE STE 100Portsmouth, NH 03801-4198
Mailing Address333 Borthwick Ave Ste 100Portsmouth, NH 03801-4198 · (603) 436-5110
Phone(603) 436-5110
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMay 12, 2020
Last NPPES UpdateJuly 31, 20244 updates tracked since enumeration
NPPES CertifiedJuly 31, 2024
✔ NPI 1124640107 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NH · 25384
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
333 BORTHWICK AVE STE 100, Portsmouth, NH 03801
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Other Names 1

Former Name (1)Lauren Horsley

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Lauren Demaris Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5991239527
PECOS Enrollment IDI20241105002755
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Elliot Hospital

Acute Care Hospitals · Manchester, NH
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number300012
Location1 Elliot WayManchester, NH 03103 · Hillsborough County
Emergency services Birthing friendly

Portsmouth Regional Hospital

Acute Care Hospitals · Portsmouth, NH
3/5 CMS rating
OwnershipProprietary
CMS Certification Number300029
Location333 Borthwick AvePortsmouth, NH 03801 · Rockingham County
Emergency services Birthing friendly

Huggins Hospital

Critical Access Hospitals · Wolfeboro, NH
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number301312
Location240 South Main StreetWolfeboro, NH 03894 · Carroll County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 03801 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$132.09 typical visit price
range $57.75 – $174.26
Typical copayment $33.02 (range $14.43 – $43.56)
Most-billed visit code 99204
Established Patient
$101.54 typical visit price
range $18.70 – $142.15
Typical copayment $25.38 (range $4.67 – $35.53)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALEXANDRA LOOMIS DO
Emergency Medicine
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (617) 763-1295
EMILY KERI RIEMER MD
Student in an Organized Health Care Education/Training Program
333 BORTHWICK AVE STE 100, GRADUATE MEDICAL EDUCATION
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110
JORGE EDUARDO SAONA CENTENO M.D.
Hospitalist
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (561) 965-7300
DOMINIC FOOA
Registered Nurse (Critical Care Medicine)
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110
NIKITA ROSEWELL MD
Student in an Organized Health Care Education/Training Program
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 559-4129
LIZBETH ANNE LIAKOS
Occupational Therapist
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 433-5110
DR. ORI OFFENBACH OFEK MD
Internal Medicine
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110
MADISON REESE DOURDOUFIS PA-C
Emergency Medicine
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lauren Demaris's NPI number?

The NPI number for Lauren Demaris is 1124640107. It was assigned to this individual provider in the NPPES registry on May 12, 2020. The provider is also known as Lauren Horsley.

Where is Lauren Demaris located?

Lauren Demaris practices at 333 Borthwick Ave Ste 100, Portsmouth, NH 03801. The listed phone number is (603) 436-5110.

What is Lauren Demaris's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Lauren Demaris enrolled in Medicare?

Yes. Lauren Demaris is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Lauren Demaris accept?

Health plans from Ambetter from NH Healthy Families and WellSense Health Plan list Lauren Demaris as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Lauren Demaris affiliated with any hospitals?

According to CMS data, Lauren Demaris is affiliated with Elliot Hospital, Portsmouth Regional Hospital and Huggins Hospital.

When was this NPI record last updated?

The NPPES record for Lauren Demaris was last updated on July 31, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.